Submission #1119927

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119927		dsyz	Carnival Tickets (IOI20_tickets)	C++17	11 / 100	9 ms	848 KiB

tickets

#include <bits/stdc++.h>
#include "tickets.h"
using namespace std;
using ll = long long;
#define MAXN (1000005)

long long find_maximum(int k, vector<vector<int>> x) {
	ll N = x.size();
	ll M = x[0].size();
	vector<ll> val;
	for(ll i = 0;i < N;i++){
		val.push_back(x[i][0]);
		val.push_back(x[i][M - 1]);
	}
	sort(val.begin(),val.end());
	pair<ll,ll> mini = {1e18,-1};
	for(auto b : val){
		ll sum = 0;
		for(ll i = 0;i < N;i++){
			sum += max(abs(b - x[i][0]),abs(b - x[i][M - 1]));
		}
		mini = min(mini,{sum,b});
	}
	vector<vector<int> > ans;
	for(ll i = 0;i < N;i++){
		vector<int> row;
		for(ll j = 0;j < M;j++){
			row.push_back(-1);
		}
		ans.push_back(row);
	}
	for(ll i = 0;i < N;i++){
		if(abs(mini.second - x[i][0]) >= abs(mini.second - x[i][M - 1])){
			ans[i][0] = 0;
		}else{
			ans[i][M - 1] = 0;
		}
	}
	allocate_tickets(ans);
	return mini.first;
}

• Subtask 1: 11 / 11
• Subtask 2: 0 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10